Singxer-SU1 with SOtM sCLK-EX Upgrade
Singxer-SU1 with SOtM sCLK-EX Upgrade

Singxer-SU1 with SOtM sCLK-EX Upgrade

Regular price $1,499.00 Sale price $890.00

High-performance USB digital audio interface, using the latest XMOS family and Xilinx high-performance CPLD / FPGA chip. All internal Singxer clocks are replaced by the SOtM sCLK-EX high performance clock board to achieve ultimate audio signal quality. Digital input interface using a standard USB2.0 interface. Several output interfaces are available on this converter, including coaxial a 10Mhz Master Clock input and additional clock outputs.

It works as a hub by receiving and distributing USB audio signals, but regenerating the USB AUDIO signal by the high-performance super clock module, sCLK-EX, installed inside the Singxer SU1. The mid-low range sounds very deep, detailed and earnest, the high range sounds not distract but extremely delicate and open, and especially the very low range gives you transparency you have never heard before and gets you very natural and solid texture of performance.

External Power Suppy Required (9V DC)

The standard power supply is replaced by a 9V DC INPUT (SOtM Form Factor). Can be powered by a SOtM SPS-500 

SOtM Internal reference clock

Custom designed ultra low phase noise oscillation circuit
Isolated differential clock signal distribution

Single clock frequency for interface system
Optional other frequency available

  • CLK1: 45.1584MHz / 49.152MHz selectable by SEL0 input
  • CLK2: 24Mhz
  • MC: 10MHz Isolated 50Ω external BNC clock input
  • Isolated clock outputs (U.FL connectors)


Windows XP, 7, 8 & 10; both 32/64 bit. Drivers must be installed (Included with product)
Native Mac-OS 10.6 and later, Drivers detected by OS
Native Linux with UAC2 compliant kernel. Drivers detected by OS
Android OS 4.2 and above. Support OTG function.


The SU-1 is the first domestic and the XMOS latest xCORE - 200 series of USB digital interface. A new generation of XMOS chip, using the more advanced process technology, the performance was doubled the old one U8 chip, the processing capacity of up to 1000 MIPS.

Used the high-speed whole isolation design, can be isolation between PC and interface of noise interference cleanly. SU-1 adopted a preeminent circuit design, using the high- speed CPLD/FPGA digital audio signal for separate after restructuring, so as to make the signal after reforming completely unaffected by isolation chip itself shaking.

SU-1 internal main board adopts the technology of the uniform source synchronous clock, CPLD/FPGA internal using special algorithm of clock signal and digital audio signal phase control strictly, can ensure that the digital audio signal after isolation chip will not appear extra distortion because of the time delay and phase difference.

It is well known that the weight of the core of the digital audio is algorithm. Singxer team are occupied in the field of digital audio for many years, at the same time we get strong support from the XMOS FAE team, we are on the basis of the original firmware had done. Many of the technical improvement and optimization algorithm.


Each output interface support the sampling rate of:

44.1 KHz, 48 KHz, 88.2 KHz, 96 KHz, 176.4 KHz, 192 KHz, 352.8 KHz, 384KHz
[theI2S out and WCLK out support all sampling rate, S/PDIF and AES/EBU highest support 192 KHZ]


2.8 MHz (DSD64) – DoP, native

5.6 MHz (DSD128) - DoP, native

11.2 MHz (DSD256) - DoP, native

22.4 Mhz (DSD512) - native! 
[theI2S out support all DSD format, S/PDIF and AES/EBU support DSD64 DOP mode]
Bit depth: up to 32 bit over I2S output and up to 24 bit over S/PDIF and AES/EBU output



Standard USB input socket USB - type B-mother, USB power supply range is 4.5 V to 5.2V

AC POWER input socket adopts three oneness of IEC320, support for AC 110 v (90 v to 120 v or 220 v, 180 v to 240v) input, 50 to60 Hz, chassis internal AC voltage switching development.

BNC output interface and RCA interface standard, S/PDIF signal level is 550 mv (standard load), the output impedance of 75 ohms.

XLR output interface standard AES/EBU signal, level of 3.3 V (standard load) and the output impedance of 110 ohms.

Word clock (WCLK) use BNC output interface, for TTL level (no load), the output impedance of 75 ohms.

I2S output signal through the HDMI socket, four road signal output, including MCLK, BCLK, LRCLK, SDATA signal, using standard LVDS difference level, impedance control in 100 ohms.

PIN13-15 DSD_ON signals, high electricity at ordinary times is I2S work in DSD mode, for LVTTL level;

PIN18 for 5 v power supply output (output current less than 20 mA), can be used as a detection connection.